- Metals also dissolve in the digestive acids produced in the human stomach.
- The lining of a person's skin is worn out and new in two to three weeks.
- The lens cells of the human eye, the heart muscle, and the main brain encyclopedia remain intact throughout life.
- The brain is like a folded muscle, and if we open the folds, it becomes almost twice as big.
- The human brain has billions of cells at the center of memory. Even if a healthy person looks at about 200 pictures for only a second, 90% of the pictures are remembered.
- The human eye can detect about 3 million different colors.
- A tiny groove of up to 12 nanometers can be felt at the touch of a human finger.
- The human heart pumps about five liters of blood per minute.
- Man's mustache and beard grow faster than others.
- Even a small sound widens a person's eye and eyelids.
- The human foot has the most sweat glands. That is why the sweat on the feet turns more.
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